>>4087797I don't think they're based on any one jacket. None are exactly like Chito's or Yuuri's. For Chi, I'd recommend the Belgian M64 which has the front 4 pockets and the built in hood. The US/Austrian M65 is rather similar but the hood it has is really thin and is made to be rolled up into the collar so it doesn't quite have the look. There is a cold weather hood that buttons onto the collar but it's got the furry trim like Yuu's so I don't think of it as an ideal candidate to get the look and I don't think it'd look right if you cut the fur off. The M64 is as close as I can find. If you sew on the cross and the black trim on the bottom it'd be very close and it's a good quality functional jacket. The M64 is also pretty cheap because no one really wants Belgian surplus.
For Yuu the only jacket that comes to mind is the US N3-B. Its made for extremely harsh weather so it's absurdly warm. I've worn mine in sub-0 weather with just a t-shirt underneath and it's still almost too warm. It has the look for sure but it's personally impossible to wear regularly. Its a really specialized piece of equipment.